Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 16 (1990), S. 97-106 
    ISSN: 1434-6079
    Keywords: 34.80.D ; 32.80.H
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have measured the ratio of cross sections σ(KL 2,3)/σ(K) for neon for electron impact in the energy range ofE 0=1.5 ... 50 keV via the intensity ofKL 2,3−LLL 2,3 Auger satellite lines relative to the intensity ofKL 1 L 2,3 (3 P) diagram line. The experimental ratio decreases over the full range of energyE 0 which is contrary to an earlier result by Carlson et al. We have also measured the alignment ofKL 2,3 1 P and3 P states via the angular distribution of Auger satellite intensity for the energy rangeE 0=1.5 ... 4 keV, within experimental error we have found a zero alignment. The totalK Auger spectrum, measured forE 0=40 keV and at the magic angle of emission ϑ=54.7°, has been decomposed into its components by using appropriate line shapes distorted by postcollision interaction. Finally, we discussed whether the lines observed at the high-energy side ofKL 2,3−LLL 2,3 Auger satellite lines can be interpreted as structures caused by an angular momentum exchange in the postcollision interaction predicted by Niehaus and Zwakhals.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 206 (1980), S. 21-33 
    ISSN: 1432-0878
    Keywords: Chromatophores ; Light-sensitivity ; Alteration in cell shape ; Microtubules ; Echinoids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Alterations in cell shape of the light-sensitive chromatophores of the sea urchin Centrostephanus longispinus were studied by scanning- and transmission electron microscopy. Transition of the aggregated to the dispersed state is accompanied by incorporation of vesicles into the membrane of the pigment cell. During dispersion a system of microtubules originating from centriole-like structures is established throughout the stellate cell. Within restricted areas of the cell, cytoplasmic differentiation and condensation is found. The possible functional significance of the findings is briefly discussed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 175 (1977), S. 551-562 
    ISSN: 1432-0878
    Keywords: Nerve plexus ; Vesicles ; Nerve cell bodies ; Ultrastructure ; Echinoids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The basiepithelial nerve plexus of the Echinoid, Centrostephanus longispinus, contains strands of nerve fibres, which measure between 0.1 and 2.0 μm in diameter. Nonciliated epithelial supporting cells do not contribute to the plexus. Within the fibres different vesicular inclusions are found. By means of serial sectioning the structure of multipolar cell bodies within the plexus could be demonstrated.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 182 (1977), S. 165-176 
    ISSN: 1432-0878
    Keywords: Chromatophores ; Light-sensitivity ; Granule motion ; Echinoids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Alterations in cell shape of the light-sensitive chromatophores of Centrostephanus longispinus are described. Upon illumination a centrifugal pigment movement starts within extremely thin filopodia which radiate from the cell body. With continued pigment migration the cellular processes increase in length and diameter and give the cell an irregular stellate appearance. Pigment movement within the cellular processes is discontinuous in space and time and may occur independently in single filopodia. The motion of single granules shows characteristic features of a saltatory movement.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 31 (1994), S. 53-54 
    ISSN: 1434-6079
    Keywords: 34.80.D ; 32.80.H
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract From intensity of Auger transitions (1s2p)−1 1 P,3 P→2p −3 2 P,2 D+e A − relative to 1s −1 2 S→2p −2 1 D+e A − measured at ϑ=54 and 90° relative to the primary electron beam we have determined the alignment of double vacancy states (1s 2p)−1 1 P and3 P of neon for electron impact ionization for the impact energies 1.5, 2.0, 2.5 and 4.0 keV. ForE 0=1.5, 2.0 and 2.5 keV the alignment is compatible with zero with an upper limit of , forE 0=4.0 keV a small negative value was found.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...